{
  "instance_id": "lastmile_small_s42",
  "strategies": {
    "routefinder": {
      "final_metrics": {
        "total_distance": 2825.18,
        "total_lateness_min": 24439.43,
        "total_objective": 198340.62,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.176
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8454,
        "avg_route_change_penalty": 0.176,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 2.734
      },
      "n_steps": 145
    },
    "rolling_horizon": {
      "final_metrics": {
        "total_distance": 2841.15,
        "total_lateness_min": 24897.17,
        "total_objective": 202022.77,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.301
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8429,
        "avg_route_change_penalty": 0.301,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 4.667
      },
      "n_steps": 145
    },
    "alns": {
      "final_metrics": {
        "total_distance": 2742.67,
        "total_lateness_min": 24414.47,
        "total_objective": 198076.41,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.382
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8413,
        "avg_route_change_penalty": 0.382,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 5.915
      },
      "n_steps": 145
    },
    "monte_carlo": {
      "final_metrics": {
        "total_distance": 2685.14,
        "total_lateness_min": 24297.95,
        "total_objective": 197068.74,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.177
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8454,
        "avg_route_change_penalty": 0.177,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 2.745
      },
      "n_steps": 145
    },
    "scenario_tree": {
      "final_metrics": {
        "total_distance": 2647.33,
        "total_lateness_min": 24290.92,
        "total_objective": 196974.69,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.127
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8464,
        "avg_route_change_penalty": 0.127,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 1.968
      },
      "n_steps": 145
    },
    "ortools": {
      "final_metrics": {
        "total_distance": 2726.19,
        "total_lateness_min": 20772.84,
        "total_objective": 168908.88,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.144
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8461,
        "avg_route_change_penalty": 0.144,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 2.239
      },
      "n_steps": 145
    },
    "reinforcement_learning": {
      "final_metrics": {
        "total_distance": 2813.08,
        "total_lateness_min": 24528.8,
        "total_objective": 199043.48,
        "reoptimization_count": 145,
        "avg_route_change_penalty": 0.144
      },
      "stability_metrics": {
        "schedule_stability_score": 0.8461,
        "avg_route_change_penalty": 0.144,
        "reoptimization_count": 145,
        "reopt_rate_per_hour": 12.083,
        "driver_disruption_index": 2.231
      },
      "n_steps": 145
    }
  },
  "ranking": [
    "ortools",
    "scenario_tree",
    "monte_carlo",
    "alns",
    "routefinder",
    "reinforcement_learning",
    "rolling_horizon"
  ],
  "winner": "ortools"
}